This optional integer specifies the maximum time in seconds that a RadSec connection can be idle before a Status-Server request is sent to keep the current TCP connection alive. This helps to keep TCP connections open in the face of "smart" firewalls that might try to close idle connections down. The default value is 0 seconds and keepalives are not used. When UseStatusServerForFailureDetect is enabled, KeepaliveTimeout together with MaxFailedRequests defines the minimum time it takes to notice the next hop has failed.